Ds1875, Pon triplexer and sfp controller – Rainbow Electronics DS1875 User Manual
Page 63
DS1875
Table 02h, Register 83h: APC DAC
FACTORY
DEFAULT
00h
READ
ACCESS
PW2
WRITE ACCESS
PW2 and APC EN = 0
MEMORY
TYPE
Volatile
83h 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT
7
BIT
0
The digital value used for APC reference and recalled from Table 05h at the adjusted memory address found in
TINDEX. This register is updated at the end of the temperature conversion.
V
BMD
=
Full Scale
255
APC DAC
Table 02h, Register 84h: Voltage Index (VINDEX)
FACTORY
DEFAULT
00h
READ
ACCESS PW2
WRITE ACCESS
PW2 and AEN = 0
MEMORY
TYPE Volatile
84h 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT
7
BIT
0
Holds the calculated index based on the MON4 voltage measurement. This index is used for the address during
lookup of Table 06h. M4DAC LUT is 32 bytes from address 80h to 9Fh. The calculation of VINDEX is as follows:
VINDEX
=
MON4
800h
+ 80h
When configured as a single LUT, all 32 bytes are used for lookup.
When configured as a double LUT, the first 16 bytes (80h to 8Fh) form the lower LUT and the last 16 bytes (90h to
9Fh) form the upper LUT.
For the three different modes, the index used during the lookup function of Table 06h is as follows:
Single
1 0 0
VINDEX
4
VINDEX
3
VINDEX
2
VINDEX
1
VINDEX
0
Double/Lower 1 0 0 0
VINDEX
4
VINDEX
3
VINDEX
2
VINDEX
1
Double/Upper 1 0 0 1
VINDEX
4
VINDEX
3
VINDEX
2
VINDEX
1
PON Triplexer and SFP Controller
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